Veneer-gluing machine



Jan. 8, 1929.

' 1,698,185 J. E. BLACK VENEER GLUING MACHINE I Filed Nov. 23, 1925 5 Sheets-Sheet 1 2712 1977 tor.

Jan. '8, i929. 1,698,185

J.'E. BLACK VENEER GLUING MACHINE Filed Nov. 23. 1925 -5 Sheets-She et 2 Jan. 8, 1929.

J. E. BLACK VENEER GLUING MACHINE Filed Nov. 23, 1925 5 Sheets-Sheet 4 WNN Jan. 8, 1929.

J. E. BLACK VENEER swine MACHINE Filed Nov. 23. 1925 5 Shegts-Slgeet 5 jazz i321??? Patented Jan. 8, 1929.

enn E. LACK, 01? MENDG'IA; ILLINOIS.

VENEER-GLUI'NG MACHINE.

Application fried ifovember 23, 1925. s mi No. 70,7.

This invention has to do with improvements in veneer gluing machines and the like. The invention relates to improvements in machines for edge uniting the veneer by a direct edge gluing operation.

by the use of one or more relatively thin strips of paper or the like secured along the adjoining edge portions of one or both S1134 faces of the veneer strips. This system has been open to numerous objections when used in certain classes of service, all of which are well known to those skilled in the art.

One object of the present invention is to provide a machine for bringing the edge portions of the veneer strips 7 into direct, firm and even contact with each other after the adhesive has been applied, and retaining them in such contact'during the setting of the adhesive. v s

Another object of the invention is to make provision for ensuring a perfectly uniform and even contact between the entire length of the edge portions of the veneer strips,

r notwithstanding any slight irregularity in the setting of the veneer strips into the machine.

Another feature of the invention relates to the provision of means for heating the edge portions of the strips while" they are held in the. firm contact with each other. In this connection, it is intended to make use of an adhesive having a chemical eeiapqsi:

tion, such that the setting thereof is either accelerated or insured by the application of asufiicient amount of heat to bring about certain chemical changes within the adhesive itself. An action of this kind is to be distinguished from a mere drying operation induced by the application of heat. The chemical reaction referred to ordinarily necessitates the application of a temperature of approximately 170 Fah, and upon the application of this temperature the adhesive itself immediately undergoes a chemical change resulting in a setting or 'hardein ing. One of theobjects of the invention is to apply aheating element to the joint at the proper time in the cycle of movements in order to insure the correct amount of this heating operation. I I

More particularly it is an object of the invention to provide a machine which shall automatically perform the various necessary operations in proper sequence, and in particular to so arrange the machine that when In'thc past it has been customary to edge unite veneers may first be positioned with their edges.

against; a set of separating sins, thereafter the sheets will be clamped to the resp'ectiye table setions, thereafter the pins will be removed from between'the sheets, thereafter the table sections will be forced together under spring pressure to bring the edges of the veneer sections together, and there after a heating element will beapplied under pressure to the.,edge portions of the veneer sections while held together. Other objectsand uses of the invention will appear from a detailed description of the same, which consists in the features of construction and combinations of parts hereinafter described and claimed;

In. the drawings:

Figure 1 shows a side elevation'of a machine embodying the features of the present invention, portions thereofbeing cut away so as to better illustrate the construct-ion ofthe tables and the operating mechanism;

. Fig. 2 shows a plan view corresponding to Fig. 1;; f a v Fig. 3 shows a sectionon the line 3 of Fig. 1, looking in the direction of the arrows, showing the table operating mechanism;

Fig. 4 shows a section on the line H of 1;, looking in the d rection of the arrows,

and illustrates the mechanism" for operating] the heating element;

Fig. 5 shows a fragmentary section on includes apair of table sectionslO and 1-1;,

the table 10 being stationary and the table 11 being. movable laterally towards and from the table 10. These tables are supported in any convenient manner, as,- for example, by means of a pair of end brackets 12 and 1-3. The table section 10 is fixed to the end brackets, whereas the tftblGfSGCtlODi 11 slidable back and forth. Springs 14 tend to shift the table section 11 over towards the section 10, said springs beingconveniently placed between lugs 15' which reach down from the bottom of the table section 11 and a longitudinally extending channel tangle completely embracing the table section on which it operates. Said clamping members 17 and 18. are also preferably of channel cross section, as clearly indicated in several of the figures.

Springs 19 are placed between the bottom faces of'the table sections and the respective clamping members, and tend to force said clamping members downward so asto press their top sections against the tables or any material carriedthereby. These springs are of sufiicicnt strength to ensure satisfactory and effective clamping of the veneer sections to the respective tables.

Reaching along below the lower portion of one or both tables is a pin bar 20, illustrated particularly in Figs. 1 and 4; A series a of pins 21 reach upwardly from said bar,

pre erably working through suitable perforations in the edge portion of the stationary table section 10. Normally this pin bar and its pins are sustained in the raised poeach other.

sition, indicated in Figs. 1 and 4, so that any veneer material placed on the table sections may be brought into definiteposition by bringing its edge against the pins. In the figures, I have illustrated the veneer sections 22 and 23 in place on the two tables and with their adjoining edges set directly against the spacing pins 21. When so set into place, the veneer sections are accurately spaced with their. adjoining edges separated exactly the desired amount and parallel to These pins may be lowered from between the veneer sections by depressing the bar 20.

The adjoining edges of the table sections 10 and 11 are tongued, as shown at 24 and 25, the overlap of said tongue portions being sufficient to ensure proper cooperation within the limits of table movement, and to thereby keep the top surfaces of the table sections in alignment,

Extending across the machine above the position of the joint and above the position of the pins 21 is a bearing member in the form of a heating bar 26 positioned to bear upon the adj oined edges of the veneer sheets. This bar has on its bottom surface a suitable heating element whereby its temperature may be maintained at the desired point. Preferably this heating element is in the form of electric resistance wires 27 suitably connected with a source of electric current. The bar 26 is conveniently provided with downwardly reaching pins 28 and 29 at its two ends, which pins are normally operated upon by springs 30 tending to depress the heating bar. 1

. pin is also lowered.

It is desired to provide mechanism for performing the following operation:

First, permitting the clampng elements '17 and 18 to be lowered into the clamping position by their springs 19; then to lower the pin block 20, together with its pins 21, a suificient distance to entirelyremove said pins from between the veneer sections; then to release the movable table section 11 and allow the same to be shifted laterally by the springs 14; and then to lower the heating bar 26 so as to carry its heating element against the top surface of the joint. It is desired to effect a reverse movement in the following sequence: 1 V i First, to raise the bar 26 with its heating element; then to release the clamps 17 and 18 by compressing their springs 19; then to withdraw the movable table section 11; and finally to lift the pin bar 20 with its instances, as the first step of the next sequence of operation. In this connection, it will be noted that upon raising the pins 21, the central united portions of the veneer sheets will be raised a slight amount above ins 21, this last action preferably taking p ace either as a delayed operation, or, in some the surfaces of the tables unless the veneer sheet be first removed. Owing to the relatively small amount of this lifting action, it will not, in most cases, cause any damage to thejoint, but insome cases, as before stated, it may be desirable to delay the raising of the pins a slight interval of time or cause them to be raised as the firststep of the nextseries of operations.

Any suitable mechanism may be provided for bringing about the movements above recited. In the particular construction illus trat-ed, however, the following arrangement is provided:

Extending across the machine is a main drive shaft 31, which isjournaled in the end brackets 12 and 13. Rotatably mounted on this shaft is a drive gear 32 which is in constant mesh with a driving pinion 33 mounted on a stub shaft 34 journaled in the bracket 12 and driven by a, pulley A clutch block 36 is splined upon the shaft 31 having a series of clutch faces 37 on one slde. These clutch faces are adapted to engage companion faces 38 on the clutch block 39 on the drive gear 82. A spring 40 tends to throw the clutch block 36 into engagement with theblock 39. hen this takes place, a driving connection-is established to drive the shaft 31. i

At a position below the clutch faces there is a release pin 4-1 slidably mounted within a bracket 42 and normally raised by a spring 43. A foot treadle 44 is pivoted atthe point 45 and operatively connected to the pin 41, sothatwhen the ,treadle is depressed, said The head 46 on the cam shaped enlargement 49 which, whenthe clutch block 36 comesaround, will ride against the pin head '46, and thus cause the block 36 to be forced sidewise and the clutch disengaged. Upon depressing the the faces 47 and 48.and the clutch block 46 is then thrown into engagement with the block 39 by the spring 40. The clutch block 39 is rotating constantly and the shaft 31 is,

therefore, picked up and turned over.

As soon as the operation commences, the operator will release the foot treadle allowing the pin head 46 to be restored to a position between the faces 47 and-48. As the shaft 31 completes a revolution, the cam surface 49' will ride up onto the pin head 46 and thus throw the clutch block 36 side wise, disengaging the clutch at the comple tion of one revolution It is thus evident that a one revolution clutch is provided.

On the shaft 31 are located the four cam wheels 50, 51, 52 and 53, the shapes of which are shown in Figs. 3, 4, 5 and 6; At one side of the machine and at a higher elevation than the shaft 31 is another shaft 54' journaled in the brackets 12 and 13 at the points 55 and 56, respectively. This shaft 54 carries the arms 57 .and 58 which are pinned to the lower ends of the bars 26' and 29, respectively. A lever 59 secured to thearm 54 has a roller 60 working on the cam block 50. Consequently, the rocking of the shaft 54 is controlled by the cam 50, which, therefore, controls theiup and down movements of the heating element.

Journaled on the shaft is a bell crank 61, the horizontal arm 62 of which can ries a roller 63 at its free end, said roller working on the cam block 51. The vertical arm 64 of said bell crank connects by a. link 65 with the lug 15 on the bottom face of the movable table section, so that the back and forth movements of said table section are controlled by the cam Swingingly mounted on the shaft 54 another arm '66, the front end of which carries a roller 67 working on the cam block 52. This arm 66 serves primarily as a guide ZLlHL' At the position of the roller 67 the arm 66 carries a yoke 68 which is connected to the lower portions of both of the clamping bars 17 and 18 by links 69 and 70, respectively. Consequently, the cam block 52 controls the movements of the clamping bars. I

There is another lever 71 also 'swingingly mounted on the shaft 54, said lever serving primarily as a guide arm. At its free end this lever carries a roller 72 working on the foot treadle, the pin head 46 is withdrawn from cam block 53; and a yoke 73 is also connected to the arm 71 at the position of the roller. This yoke'reaches up and is con' nected to the pin bar 20. Consequently, the movements of said pin bar are controlled by the cam block 53. Reference to Figs. 3, 4, 5 and 6 will show the relative shapes of the cam blocks. 'Rotation of the cam blocks is counterclockwise, as indicated by the arrows in said figures. Comparison of the various camblocks will show that thefirst operation is the clamping of the clamps 17 and 18, dueto the riding of the roller 67 over the shoulder 74 of the he next operation is the riding of the roller 72 over the shrmlder75 of the cam block which emits in the lowering of the cam block 52. I

spacing pins from between the veneer sheets] 'The next movement is the riding of the roller63 over the shoulder76 of the cam block 51 resulting in the lateral shifting of the table section 11 to bring the edges of theveneer sheets together. The next opera tion is the riding of the roller 66 over the shoulder 77 of the cam block 50 resulting in the lowering of the heating element.

The next operation s the riding of the roller 60 onto the shoulder 76 of the cam block 50 resulting in raisingthe heating element; the next operation is the. riding of the roller 67 onto the shoulder 79 of the clamping bars; the next operation is the riding ofthe roller 7 2 onto the shoulder 80 of the cam block 53 resulting in raising thespacing pins; and the next operation is the riding of the rol er 68 onto theshoulder 81 oft-he cam block resulting inthe separating movement of the table section 11.

' F mination' of Fig. 3 shows that the hea '9' tion due to the application of the heating element. As previously stated, the glue or adhesive is preferably on e which un g a chemical change to the'application of heat, as distinguished from a merely drying action. Such a. glue, which is well known in the art, comprises dried black blood a lbu-- min, one hundred parts by weight; distilledwater, onehundred eighty parts by weight; slaclred lime, five parts by weight; and ammonium hydroxide, six parts by weight.

To prepare this glue, mix the water and 0 element retained in the lowered position during the movement betweenthe shoulders 77 and 78. .This interval should be sufficient to ensure proper chemical ac-v cam block 52 resulting in releasing the the albumin, stirring gently, and allow to lVhile I have herein shown and described only a single embodiment of the features of my present invention, still I do not intend to limit myself to the same, except as I may do so in the claims.

I claim:

1. A machine of the class described, including in combination a pair of supports for veneer sheets lying in substantially the sameplane, at lease one of which supports is shiftable towards and from the other, a vertically movable veneer spacing device adjacent to the edges of said supports, means for clamping veneer material on each support, and a vertically movable heating device substantially in line with the adjacent edges of the supports, together with means for forcing the clamping means into co-operative relationship with the supports, thereafter removing the spacing device from be tween the veneer sheets, thereafter shifting the movable support laterally to carry the edges of the veneer material together, thereafter forcing the heating device into engagement with the edge portions of the veneer material, and thereafter disengaging the heating device and the clamping devices, substantially as described.

A machine of the class described, including in combination a pair of supports for veneer sheets located adjacent to each other and relatively shiftable one towards and from the other, a vertically movable veneer spacing device adjacent to the edges of said supports, means for clamping veneer material on each support, and a vertically movable heating device substantially in line with the adjacent edges of the supports, together with means for forcing the clamping means into co-operative relationship with the supports, thereafter removing the spacing device from between the veneer sheets, thereafter shifting the movable support laterally to carry the edges of the veneer ma: terial together, thereafter forcing the heating device into engagement with the edge portions of the veneer material, and thereafter disengaging the heating device and the clamping devices, substantially as described.

3. A machine of the class described, including in combination a pair of supports for veneer sheets located adjacent to each other and relatively shiftable one towards and from the other, a vertically movable veneer spacing device adjacent to the edges of said supports, means for clamping veneer material on each support, and a vertically movable heating device substantially in line with the adjacent edges of the supports, together with means for foreinv the clamping means into co-operative relationship with the supports, for removing the spacing de vice from'between the veneer sheets, for shifting the movable support laterally to carry the edges of the veneer material together, and for forcing 'the heating device into engagement with the edge portions of the veneer material, substantially as described.

l. A machine for joining sheet material, having a holding device for independently clamping each of the sheets and comprising press bars and means for moving the said press bars together with the sheet between them one towards the other, a pressing element intermediate the said press bars adapted to move at right angles to the latter movement of the press bars, and means to move said pressing element subsequently to the movement of the press. bars. i

I 5. A machine for joining sheet material, having a holding device for independently clamping each of the sheets and comprising press bars and means formoving the said press bars with the sheet between them one towards theother, a pressing element intermediate the said press bars adaptedto move at right angles to the latter movement of the press bars, means to heat thesaid pressing element, and means to move said pressing element subsequently to the movement of the press bars.

6. A machine for joining veneers and having in combination abutment members for the correctalignment ofthe sheets introduced, a holding device comprising movable press bars, a pressing jack between the said pressing bars and consisting of an up per and a lower member, a main shaft, and means upon the said main shaft independently to move the pressing bars, the pressing jack and the abutment members, the latter movement being established after the clampin g of the veneers between the press bars and prior to their lateral movement.

JOHN E. BLACK. 

